/** layout  **/

div#app {
	  display: flex;
    flex-direction: column;
    justify-content: center;
    width: 100%;
    margin: 0 auto;
}

@media screen and (max-width: 1024px) {
  div#app {
    width: 100vw;
  }
}

/* header{
    flex: auto;
    min-width: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 100px;
} */

header {
  flex: auto;
  min-width: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-start; /* 从左端开始排列 */
  height: 100px;
}

nav {
  flex: auto;
  min-width: 100%;
  font-weight: 600;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  height: 40px;
  background-color: #52bdf3;
}

main {
  min-width: 100%;
  display: flex;
  flex: auto;
  min-height: calc(100vh - 140px);
}

footer {
  flex: auto;
  min-width: 100%;
  height: 80px;
  align-items: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background-color: #f0f0f0;
}

a {
  text-decoration: none;
}

img {
  width: 100%;
}
